Difference between PT and PT4 Key | Ask the Experts

Question:

I have a key marked “A1145L”, can I get cylinders for this key?

 

Answer:

A1145L is the ILCO name for their key blank in the Schlage “L” keyway. The “L” keyway is master-milled to operate the Schlage “C, E, F, and G” keyways. You can get cylinders in any of the preceding keyways and they will accept that key blank, but there are no cylinder manufactured in only that keyway.

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